Check for updates

Cancer Risks Associated With TP53 Pathogenic Variants: Maximum Likelihood Analysis of Extended Pedigrees for Diagnosis of First Cancers Beyond the Li-Fraumeni Syndrome Spectrum

Cristina Fortuno, PhD1 D; Bing-Jian Feng, PhD2 D; Courtney Carroll, MSc2 D; Giovanni Innella, MD3 D; Wendy Kohlmann, MSc2 D; Conxi Lázaro, PhD4,5,6 (D); Joan Brunet, MD, PHD4,5,6,7 (D); Lidia Feliubadaló, PhD4,5,6; Silvia Iglesias, MSc4; Mireia Menéndez, PhD4; Alex Teulé, MD4,5; Mandy L. Ballinger, PhD8,9 [D; David M. Thomas, MD, PhD9,10 (D); Ainsley Campbell, MD11 (D); Mike Field, MD12 [D; Marion Harris, MD13; Judy Kirk, MD14; Nicholas Pachter, MD15 (D); Nicola Poplawski, MD16,17 (D); Rachel Susman, MD18 D; Kathy Tucker, MD19,20 [D; Mathew Wallis, MD21,22 [D; Rachel Williams, BSc20,23 (D; Elisa Cops, BSc24; David Goldgar, PhD2 D; kConFab Investigators25,26; Paul A. James, MD, PHD24,26 (D and Amanda B. Spurdle, PhD1 OD ;

DOI https://doi.org/10.1200/PO.23.00453

ABSTRACT

PURPOSE Establishing accurate age-related penetrance figures for the broad range of cancer types that occur in individuals harboring a pathogenic germline variant in the TP53 gene is essential to determine the most effective clinical man- agement strategies. These figures also permit optimal use of cosegregation data for classification of TP53 variants of unknown significance. Penetrance esti- mation can easily be affected by bias from ascertainment criteria, an issue not commonly addressed by previous studies.

ACCOMPANYING CONTENT

Appendix Data Supplement

Accepted December 21, 2023 Published February 27, 2024

JCO Precis Oncol 8:e2300453 @ 2024 by American Society of Clinical Oncology

Downloaded from ascopubs.org by National Library of Medicine - US on April 4, 2026 from 130.014.025.182 Copyright @ 2026 American Society of Clinical Oncology. All rights reserved.

MATERIALS AND METHODS

We performed a maximum likelihood penetrance estimation using full pedigree data from a multicenter study of 146 TP53-positive families, incorporating adjustment for the effect of ascertainment and population-specific background cancer risks. The analysis included pedigrees from Australia, Spain, and Uni- ted States, with phenotypic information for 4,028 individuals.

RESULTS

Core Li-Fraumeni syndrome (LFS) cancers (breast cancer, adrenocortical carcinoma, brain cancer, osteosarcoma, and soft tissue sarcoma) had the highest hazard ratios of all cancers analyzed in this study. The analysis also detected a significantly increased lifetime risk for a range of cancers not pre- viously formally associated with TP53 pathogenic variant status, including colorectal, gastric, lung, pancreatic, and ovarian cancers. The cumulative risk of any cancer type by age 50 years was 92.4% (95% CI, 82.2 to 98.3) for females and 59.7% (95% CI, 39.9 to 81.3) for males. Females had a 63.3% (95% CI, 35.6 to 90.1) cumulative risk of developing breast cancer by age 50 years.

CONCLUSION

The results from maximum likelihood analysis confirm the known high lifetime risk for the core LFS-associated cancer types providing new risk estimates and indicate significantly increased lifetime risks for several additional cancer types. Accurate cancer risk estimates will help refine clinical recommendations for TP53 pathogenic variant carriers and improve TP53 variant classification.

INTRODUCTION

Li-Fraumeni syndrome (LFS) is a hereditary cancer disorder caused by germline pathogenic variants in the TP53 gene, which predispose individuals to a wide range of cancers. Most of these cancers are rare and have an earlier age of onset than in the general population. The most characteristic cancers are female breast cancer, osteosarcoma, soft tissue sarcoma, brain tumors, and adrenocortical carcinoma,

termed the core LFS cancers.1,2 Although TP53 genetic testing was previously recommended only for individuals meeting certain clinical criteria, termed the classic LFS or Chompret 2015 criteria,3,4 the identification of TP53 carriers in multi- gene panel testing has demonstrated that LFS has a broader cancer spectrum than previously recognized.5 A wider cancer spectrum is also supported by studies of the International Agency for Research on Cancer (IARC) TP53 database6 and the National Cancer Institute,7 which indicate the need to

CONTEXT
Key Objective

To provide more accurate estimates of cancer risks associated with Li-Fraumeni syndrome (LFS), a hereditary cancer disorder caused by TP53 gene pathogenic variants, by using a statistically sophisticated approach that addresses issues around ascertainment bias and the wide range of competing risks.

Knowledge Generated

By conducting a comprehensive analysis of diverse cancer types in TP53 pathogenic variant carriers, the study provides accurate estimates of cancer risks, including beyond the core LFS cancers. This study revealed that individuals with TP53 germline pathogenic variants have a significantly increased risk of developing a broad spectrum of cancers, including colorectal, lung, gastric, leukemia, melanoma, and more, with higher risks in females compared with males.

Relevance

This information is crucial for improving clinical management strategies, which may include personalized surveillance and screening approaches for TP53 pathogenic variant carriers to detect and manage cancer at an earlier stage.

better understand the LFS cancer spectrum. To provide ef- fective clinical management, it is important to identify which cancers have a significantly increased risk associated with TP53 germline pathogenic variants (relative to pop- ulation risk), as well as calculating the lifetime personal risk for each cancer. Accurate penetrance estimates are also required as a defined parameter for Bayesian segregation analysis methods that have been shown to outperform meiosis counting in the assessment of the causality of variants of uncertain clinical significance.8

A number of primarily observational studies report an in- creased risk of noncore cancer types in LFS families, in- cluding melanoma, lung cancer, GI cancers, thyroid cancer, prostate cancer, ovarian cancer, leukemias, and lymphomas, among others.4,9-17 As some of these cancers are relatively common in the general population, the studies to date have not been able to provide conclusive evidence to determine if these are causally linked to germline TP53 variants. Even for the core LFS cancers, with a firmly established association with TP53 pathogenic variant status, the specific age-related risk for these has not been clearly established or validated across different cohorts.

Six previous studies have estimated the TP53-associated penetrance for specific cancer types using a range of dif- ferent methods, selection criteria, and number of pedigrees (summarized in Table 1).10,18-21 Of these six studies, three investigated risk in seven or fewer families, with only one using a segregation-based method. For all studies, sample size and methods used restricted penetrance estimation to only a subset of cancer types. Furthermore, most of these studies analyzed TP53 families that were highly selected on the basis of existing testing criteria. It is likely that the results from analysis of families recruited based only on the proband’s diagnosis (ie, not considering the cancer family history) are less susceptible to ascertainment bias. However,

there is known to be variation in the disease risk and cancer spectrum associated with individual TP53 variants, and even the details of the proband’s diagnosis could introduce an element of selection bias. To minimize these concerns, it is important to conduct penetrance estimations from a large number of pedigrees using information from as many family members as possible, addressing issues around ascertain- ment bias through the use of pedigree data that are able to take the context of the family history into account. The segregation-based maximum likelihood method represents a powerful way to address these issues by conditioning the analysis on the family component that led to the ascer- tainment and providing the ability to consider the whole pedigree structure and population background incidence. The strength of this approach has been demonstrated by international collaborations that have successfully analyzed the cancer risks associated with pathogenic variants in several cancer genes, including PALB2 (524 pedigrees), RAD51C (125 pedigrees) and RAD51D (60 pedigrees), POLE and POLD (50 pedigrees), and BRCA1 (906 pedigrees) and BRCA2 (367 pedigrees),2-25 as well as a recent population-based breast cancer study of 17,425 families.26

In this study, we applied the maximum likelihood approach to the analysis of pedigree data from families with a known TP53 pathogenic variant from three countries. The study aimed to refine the list of cancers known to have a signif- icantly increased risk in individuals harboring a TP53 pathogenic germline variant and provide improved esti- mates of the cumulative cancer risk by age.

MATERIALS AND METHODS

Data Sets

A total of 146 unique informative pedigrees (4,028 indi- viduals) from five different sites in three countries were used

Downloaded from ascopubs.org by National Library of Medicine - US on April 4, 2026 from 130.014.025.182

Copyright @ 2026 American Society of Clinical Oncology. All rights reserved.

TABLE 1. Overview of Studies Investigating Cancer Risk/Incidence Associated With TP53 Germline Pathogenic Variants
StudyNo. of TP53-Positive PedigreesSelection criteriaMethodsReported Findingsª
Hwang et al,18 20037Cancer history consistent with the classic LFS criteriaKaplan-Meier analysisCumulative cancer risk by ages 20, 30, 40, and 50 years of 18%, 40%, 77%, and 93%, respectively, in females and 10%, 21%, 33%, and 68%, respectively, in males
Wu et al,19 20067Childhood soft tissue sarcomaSegregation-basedCumulative cancer risk by ages 20, 40, and 60 years of 96%, 100%, and 100%, respectively, in females and 40%, 86%, and 98%, respectively, in males
Mai et al,10 2017107NCI LFS study-meeting clinical criteria for classic LFS or Li-Fraumeni-like syndrome, as well as those with choroid plexus carcinoma, adrenocortical carcinoma, or ≥3 cancers, as well as those identified to carry a germline TP53 variantKaplan-Meier analysisCumulative cancer incidence by age 31 years of 50% for females and 46 years for males, and almost 100% by age 70 years for both sexes
Fan et al,20 20215Participants unselected for personal or family history of breast cancerKaplan-Meier analysisBreast cancer risk of 25% by age 40 years and 44% by age 50 years
de Andrade et al,7 2022143 (includes families analyzed by Mai et al,10 2017)NCI LFS study-meeting clinical criteria for classic LFS or Li-Fraumeni-like syndrome, as well as those with choroid plexus carcinoma, adrenocortical carcinoma, or ≥3 cancers, as well as those identified to carry a germline TP53 variantObservational study using family-clustered Cox regression models and competing risk methodsBreast cancer risk by age 60 years of 56%. LFS individuals had 24 times higher incidence of any cancer compared with the general population
Evans et al,21 202317 total: 6 (c.455C>T [p.Pro152Leu]), and 11 (codon 245/248)Families from research studies tested for very early onset breast cancer and LFS Chompret criteriaKaplan-Meier analysisFamilies with c.455C>T (p.Pro152Leu) had a lower risk of nonadrenal cancers and no increased risk of breast cancer. Families with codon 245/248 variants had a 100% risk of breast cancer by age 36 years and 100% risk of all cancers before age 60 years

Abbreviation: LFS, Li-Fraumeni syndrome. ªSee publication for cancer-specific figures.

for cancer risk analyses, with a median of 33 individuals per family. Details and selection criteria are described in Table 2. Families were considered informative and therefore included in the analyses, if at least two family members had been genotyped. There were a total of 741 genotyped individuals regardless of the cancer affected status, with a median of four genotyped individuals per family. Where available for any family member, the data collected included date of birth/ death, cancer status, age at diagnosis, TP53 result, date of any prophylactic surgeries, and date of last follow-up. The analysis included families with a variant reported as pathogenic or likely pathogenic (P/LP) by local diagnostic

laboratories, which were then checked against ClinVar or TP53 quantitative models.27,28 Families segregating the reduced- penetrance Brazilian founder variant NM_000546.6(TP53): c.1010G>A (p.R337H), which is classified as P/LP in ClinVar, were not included. The list of unique variants included along with ClinVar and quantitative model data is provided in the Data Supplement (Table S1), as well as the number of in- formative pedigrees with each variant.

This study has been approved by the QIMR Berghofer MRI Human Research Ethics Committee (P1051). This study received the IDIBELL institutional review board (IRB)

TABLE 2. Overview of Sample Sets Used in the Analysis
CountrySiteFamiliesIndividualsSelection Criteria
AustraliaISKS7277Personal or family history of sarcoma
AustraliakConFab12468Personal or family history of breast-ovarian cancer
AustraliaICCon501,545Personal or family history of cancer indicating hereditary disease
SpainCatalan Institute of Oncology13375
US (Utah)University of Utah641,363

Abbreviations: ICCon, Inherited Cancer Connect; ISKS, International Sarcoma Kindred Study.

approval PR025/10. This study has been approved by the University of Utah IRB (IRB_00046740). Consent for re- search had previously been obtained for individuals pre- viously recruited into research cohorts, and requirement for consent was waived by the IRB for sharing of deiden- tified data for the remainder of individuals in cohorts ascertained clinically.

Statistical Analyses

Pedigree Data

Pedigree data were collected, cleaned, and exported in an analyzable format, using Progeny software (version 10.6.2.0). Families from the three Australian sites identified to overlap were merged into a single pedigree for analyses. Individuals were censored as affected at the age of first cancer diagnosis, or, if unaffected, at the earliest of age at risk-reducing surgery, death, or last follow-up. Family members with missing ages of cancer diagnosis were not considered in the analyses, unless information was available on age of death or last follow-up, which was used conser- vatively as an age of diagnosis in 43 individuals (median age, 44 years). Individuals with nonmelanoma skin cancers (C44) and benign tumors were considered as unaffected for all analyses, but were censored at the age of these diagnoses if no other relevant cancer or later follow-up age information. Where an individual had a TP53 pathogenic variant con- firmed to be de novo by genotyping or mosaicism, their ancestors were excluded from the analyses. This was the case for 10 (13%) of all 146 families, a figure compatible with the reported frequency of TP53 de novo events between 7% and 20%.29 The pedpro program available on the COOL website (COOL, Co-segregation Online)8 was used to correct for family structure errors.

Cancer Population Incidence

Data on population cancer incidence were retrieved from the IARC website31 for the population most relevant to our data sets (Australia 2003-2007, Spain-Girona 2003-2007, United States Utah 2003-2007) and combined proportionally to the number of observed cases and person-years at risk. International Classification of Diseases code definitions for each of the cancers analyzed are specified in the Data Supplement (Table S2).

Hazard Ratio and Cumulative Cancer Risk Calculations

Hazard ratios (HRs) associated with each cancer were calculated as the ratio of developing a given cancer type as a first cancer among TP53 P/LP carriers in comparison with the general population. The HR was calculated indepen- dently for the following malignancies and groupings: all cancer types in the data set, all core LFS cancers (except breast cancer), adrenocortical carcinoma, breast cancer, brain cancers, osteosarcoma, soft tissue sarcoma, osteo- sarcoma + soft tissue sarcoma including unspecified

sarcomas, colorectal cancer, gastric cancer, leukemia, lung cancer, melanoma, non-Hodgkin lymphoma, pancreatic cancer, renal cancer, cervical cancer, ovarian cancer, and prostate cancer. For other cancers such as endometrial cancer, head and neck cancer, liver cancer, and thyroid cancer, there were no known carriers except for a single individual with thyroid cancer. The HR could therefore not be calculated for these cancers, given their rarity in our data sets and/or absence of sufficient genotyped affected indi- viduals. To calculate the HRs, we used a maximum likeli- hood analysis method,22 which is implemented in a modified version of the software MENDEL.32 This method considers the whole pedigree structure and assigns a probability of being a carrier to each individual on the basis of the known genotype information within the pedigree, in an iterative process that continues until the genotype probability estimates are found that result in the best fit to the observed phenotype and genotype data. The effect of ascertainment bias was controlled for by conditioning on the likelihood of data on the basis of the proband’s ge- notype and all family members’ phenotypes. HRs were calculated using a constant model for each malignancy, in addition to age-dependent continuous models for those with the highest number of affected/genotyped individuals. To fit age-dependent models, three age groups were assigned on the basis of existing clinical criteria33 as well as commonly investigated age groups for specific cancers, with the middle group calculated by interpolation. Separate models were fitted for all cancer types, ≤18 years versus >45 years; core LFS cancers, ≤18 years versus >45 years; breast cancer, ≤30 years versus >50 years; brain cancer, ≤45 years versus >45 years; and prostate cancer, ≤60 years versus >60 years. Significant HRs were converted to cumulative cancer risks by age using population background cancer incidence at 5-year age groups from 0 to 75 (considered lifetime) for core LFS cancers and for all cancer types combined. Cu- mulative cancer risks by age were calculated for age groups from 0 only up to age 60 years for all other cancers, a conservative approach to account for the lower number of confirmed genotyped individuals in this latter group. A secondary age-dependent analysis was performed for all cancer types and core LFS cancers, using ≤18 years versus >60 years as age groups.

RESULTS

Overview of the Cancer Spectrum

A summary of the spectrum of first cancers according to sex (irrespective of pathogenic variant status as well as in confirmed TP53 carriers) is shown in Table 3. Details of the number of first cancer diagnoses according to age group, sex, and TP53 status is provided in the Data Supplement (Table S2). Of all 4,028 individuals denoted in the pedigrees, 2,014 (50%) were female, 2,014 (50%) were male, and 971 (24%) were affected with at least one cancer; of the cancer-affected individuals, 206 were affected with multiple cancers. In females, core LFS cancers represented 60% of all cancers and

Downloaded from ascopubs.org by National Library of Medicine - US on April 4, 2026 from 130.014.025.182

TABLE 3. Spectrum of First Cancers According to Sex in all Individuals From the Data Set (2,014 females and 2,014 males) With the Number of Confirmed TP53 Carriers for Each Cancer
Cancer (first)Females (carriers)Males (carriers)
All cancer typesª552 (179)419 (92)
Adrenocortical carcinoma10 (8)2 (1)
Breast cancer248 (104)4 (0)
Brain cancer35 (11)60 (19)
Osteosarcoma22 (8)21 (10)
Soft tissue sarcoma16 (9)27 (19)
Unspecified sarcoma16 (5)9 (2)
Cervical cancer9 (3)NA
Colorectal cancer22 (2)42 (5)
Gastric cancer11 (1)18 (2)
Leukemia19 (2)19 (4)
Lung cancer27 (4)41 (1)
Melanoma15 (3)17 (5)
Non-Hodgkin lymphoma7 (0)7 (2)
Ovarian cancer17 (5)NA
Prostate cancerNA54 (11)
Pancreatic cancer7 (0)11 (0)
Renal cancer4 (1)8 (1)
Other/Unknown67 (13)79 (10)

Abbreviation: NA, not applicable.

ªThis includes all cancers in the data set including classified as other and unknown.

15% without including breast cancer. Breast cancer was the most common cancer in females (45% of all total malig- nancies), followed by brain cancer (6%) and lung cancer (5%). In males, core LFS cancers represented 26% of all cancers. Brain cancer was the most common cancer in males (14%), followed by prostate cancer (13%) and colorectal cancer (10%).

HRs Associated With Each Cancer Type

HR estimates for each cancer type according to sex are shown in Table 4. The combined HR for all cancers was nonsig- nificantly higher in females than in males, both using the constant model (10.6 v 6.7) and at the different age groups analyzed by the age-dependent model. For both sexes, the LFS core cancers had the highest individual HRs. Of note, both females and males continued to have a significant HR of developing all cancer types as well as core LFS cancers after age 45 years, and after age 60 years in the secondary age- dependent model (Data Supplement, Table S3). The core LFS cancer with the highest HR was adrenocortical carcinoma in females (HR, 78.3), with all cases occurring before age 18 years but there were insufficient data in males to calculate a HR for this cancer. The HR associated with breast cancer in females was 10.7; however, the age-dependent model revealed the HR to be highest before age 30 years (HR, 43.6)

and not significant after age 50 years. For males, the HR was significant for all cancers analyzed except melanoma and renal cancer. For females, the HRs for lung cancer, mela- noma, ovarian cancer, and renal cancer were statistically significant.

Cumulative First Cancer Risks for All Cancer Types and LFS Core Cancers

On converting the significant HRs from the analysis to age- specific cumulative cancer risks on the basis of population background incidences, the risk of developing any cancer type in females was 41% by age 30 years and 98% by age 70 years. In males, this was 19% by age 30 years and 92% by age 70 years (Fig 1, details in the Data Supplement, Tables S4 and S5).

In females, the LFS core cancer with the highest lifetime risk was breast cancer (7% by age 30 years and 71% by age 70 years), followed by brain cancer (9% lifetime risk), soft tissue sarcoma (4%), osteosarcoma (3%), and adrenocor- tical carcinoma (2%). When including unspecified sarcoma subtypes, assumed to be either osteosarcoma or soft tissue sarcoma, the lifetime risk of developing any of these ma- lignancies was 17% (Data Supplement, Table S4). When analyzed together excluding breast cancer, the lifetime risk of developing a first core LFS cancer in females was 30% (Data Supplement, Table S4).

In males, the LFS core cancer with the highest lifetime risk was brain cancer (15%), followed by soft tissue sarcoma (6%) and osteosarcoma (4%), with no data available for adrenocortical carcinoma. When including unspecified sar- coma subtypes, the lifetime risk was 11% (Data Supplement, Table S5). When analyzed together, the lifetime risk of de- veloping a first core LFS cancer was 23% (Data Supplement, Table S5).

Cumulative First Cancer Risks for Cancer Types Outside the LFS Core Spectrum

Age-specific cumulative risks were also calculated for can- cers outside the LFS core spectrum that had a significantly increased HR in the maximum likelihood analysis (Fig 2). In females, the risk of developing a cancer type outside the LFS core spectrum by age 60 years was highest for melanoma (8%), followed by lung cancer (7%), ovarian cancer (6%), and renal cancer (4%). In males, this risk was highest for prostate cancer (22%), followed by colorectal cancer (12%), lung cancer (9%), non-Hodgkin lymphoma (5%), gastric cancer (4%), pancreatic cancer (4%), and leukemia (2%).

DISCUSSION

To our knowledge, this study of 146 families is the first to provide age-specific risks of diverse cancer types in TP53 pathogenic variant carriers using maximum likelihood segregation analysis. Our estimated penetrance figures are

TABLE 4. HR Estimated for Different Cancer Types Derived from Maximum Likelihood Analysis of 146 TP53+ Families
Cancer (first)FemalesMales
HRLower 95% CIUpper 95% CIHRLower 95% CIUpper 95% CI
All cancer typesª (constant)10.67.714.66.74.69.8
All cancer typesa ≤18 years41.626.365.817.29.032.9
All cancer typesª >45 years5.13.18.74.22.47.1
Core LFS cancersb (constant)9.55.716.020.49.444.2
Core LFS cancersb ≤18 years40.519.185.824.08.567.6
Core LFS cancersb >45 years3.31.110.115.33.372.2
Adrenocortical carcinoma78.344.2138.9No data
Breast cancer (constant)10.77.116.1No data
Breast cancer ≤30 years43.618.9100.9No data
Breast cancer >50 years2.20.86.3No data
Brain cancer (constant)42.815.9114.915.85.941.8
Brain cancer ≤45 years55.119.4156.516.25.349.8
Brain cancer >45 yearsNo data14.42.0104.8
Osteosarcoma44.76.3318.042.111.3156.2
Soft tissue sarcoma23.73.8146.621.34.895.4
Osteosarcoma + soft tissue sarcomac79.525.0253.334.612.199.3
Cervical cancer4.40.295.2NA
Colorectal cancer1.50.36.36.02.116.6
Gastric cancer6.70.857.111.01.674.2
Leukemia4.00.819.44.01.015.4
Lung cancer9.12.336.04.81.515.6
Melanoma5.41.223.42.10.67.5
Non-Hodgkin lymphomaNo data6.31.428.3
Ovarian cancer11.12.060.3NANANA
Pancreatic cancerNo data12.01.974.8
Prostate cancer (constant)NA5.62.313.4
Prostate cancer ≤60 yearsNA13.84.641.3
Prostate cancer >60 yearsNA3.21.19.2
Renal cancer15.42.1111.84.00.627.0

Abbreviations: HR, hazard ratio; LFS, Li-Fraumeni syndrome; NA, not applicable.

ªThis includes all cancers in the data set including others and unknown.

bThis includes adrenocortical carcinoma, brain cancer, osteosarcoma, soft tissue sarcoma, as well as unknown sarcoma subtypes.

“This includes unknown sarcoma subtypes.

somewhat lower at earlier ages than reported for previous studies, likely because of the methodological approach that allows for stringent correction for ascertainment and takes advantage of the whole pedigree structure. Nevertheless, a >90% lifetime risk of developing any cancer was reached earlier in females (50 years) than in males (70 years), reflecting the very high risk of breast cancer for women and reinforcing the extremely high lifetime risk of cancer as- sociated with TP53 pathogenic germline variants. The findings also revealed statistically significant increases in the risk of other cancer types beyond the LFS spectrum, such as colorectal, lung, gastric, pancreatic, and ovarian cancers. This is consistent with previous suggested and/or reported associations,4,9-17 but our results additionally provide estimates of the extent of association with TP53 considering the population background incidence, which

las implications for recommendations on clinical management.

Wu et al19 found females had cumulative cancer risks of 96%, 100%, and 100% at ages 20, 40, and 60years, respectively, while males had risks of 40%, 86%, and 98%. In our study, female risks were 18%, 75%, and 96%, respectively, and 9%, 35%, 80% for males. Other studies reported risks as high as 22% by age 5 years and 41% by age 18 years.4 The analysis by Mai et al10 of 107 families reported a cumulative cancer in- cidence of 50% by age 31 years in females and age 46 years in males, approaching 100% by age 70 years. In our study, female cancer risk by age 30 years was 41% and male risk by age 45 years was 47%. Our cumulative cancer risks for all core LFS cancers are generally lower than those of Mai et al,10 except for female brain cancer.

FIG 1. Cumulative risk of first cancer diagnosis for all cancer types and individual core LFS cancers, for (A) females and (B) males. ªCumulative risks calculated using an age-dependent model. bResults from females only because of lack of data in males.

A

B

Females

Males

100

100

Cumulative Risk (%)

Cumulative Risk (%)

75

75

Cancer

All cancer typesª

Cancer

50

Breast cancerª

50

- All cancer typesª

Brain cancerª

- Brain cancera

Soft tissue sarcoma

Osteosarcoma

Osteosarcoma

Soft tissue sarcoma

Adrenocortical carcinomab

25

Adrenocortical carcinoma

25

0

0

0

20

40

60

0

20

40

60

Age (years)

Age (years)

As expected, the LFS core cancers had the highest HRs in both males and females. However, when the rarity of most of the core cancers in the general population was taken into account, the lifetime absolute risk for these core cancer types occurring as first cancer was eclipsed by the absolute risk of other cancers more common in the population, such as lung or colorectal cancer. Although most previous studies have reported that LFS core cancers are the most common to occur among TP53 carriers, the cancer spectrum of our data and results from maximum likelihood analysis suggest other- wise. For example, in males, the lifetime cumulative risk of developing a core LFS cancer was estimated to be 23% (30% in females when excluding breast cancer), while this was >95% for any cancer type in both sexes, indicating the preponderance of cancer types outside the LFS spectrum. This study provides statistical evidence that an increased risk of a broad range of other cancers is associated with TP53 pathogenic variants, in particular, colorectal cancer, gastric cancer, leukemia, lung cancer, melanoma, non-Hodgkin lymphoma, pancreatic cancer, renal cancer, ovarian can- cer, and prostate cancer. As we lacked data on cancer

verification, there is a potential for some degree of mises- timation in our results for these other cancers. The lack of statistical significance in one sex versus the other for certain cancers that do not show major sex differences in the population most likely reflects limited power because of limited numbers of genotyped affected individuals rather than an actual significant sex difference, as evidenced from the broad CIs around the HRs for non-LFS core cancers. This is especially relevant for females, where approximately 25% were affected with breast cancer as first cancer, limiting power to accurately assess the risk of nonbreast cancer as first cancer diagnosis. Future larger analyses that model these individual cancer types simultaneously with risk of core LFS cancers will be required to more accurately assess the HRs for noncore cancers while adequately conditioning for ascertainment, as has recently been conducted for nonbreast and nonovary cancer types for BRCA1 and BRCA2.25

Our study was restricted to the analysis of first cancers, to avoid the introduction of potential biases because of the incidence of second cancers being influenced by the medical

FIG 2. Cumulative risk of first cancer diagnosis for cancers outside the LFS spectrum shown to have statistically significant as- sociations, for (A) females and (B) males. ªCumulative risks calculated using an age-dependent model.

A

B

Females

Males

12

40

Cumulative Risk (%)

Cumulative Risk (%)

8

30

Cancer

Cancer

Prostate cancerª

Melanoma

Colorectal cancer

Lung cancer

20

Lung cancer

Ovarian cancer

Non-Hodgkin lymphoma

4

Renal cancer

Gastric cancer

Pancreatic cancer Leukemia

10

0

0

0

20

40

60

0

20

40

60

Age (years)

Age (years)

or surgical management of the first cancer or the described effect of radiotherapy on second cancer rates in LFS. It is therefore critical to emphasize that our results represent risks of these cancers occurring as first cancer in the absence of other competing risks. As hypothesized by de Andrade et al, 7 there might be a trigger effect combining biological and/or treatment-related factors affecting individuals with multiple cancers. Future studies that are able to account for these potentially complex relationships would be beneficial to provide reliable estimates for risk of cancers beyond the first cancer.

Our results could also improve TP53 variant classification, for example, calibration of criteria that use proband’s pheno- type as evidence for/against pathogenicity and improved cosegregation modeling via the online segregation tool COOL,8 which currently relies on results from seven TP53- positive families.

In conclusion, this analysis of 146 families harboring pathogenic variants in TP53 from three countries has demonstrated the value of using maximum likelihood analysis to calculate accurate cancer risk estimates associ- ated with TP53 pathogenic variants for diverse cancer types.

AFFILIATIONS

1Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia

2Huntsman Cancer Institute, University of Utah, Salt Lake City, UT

3Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy

4Hereditary Cancer Program, Catalan Institute of Oncology, L’Hospitalet de Llobregat, Barcelona, Spain

5Hereditary Cancer Program, ONCOBELL, IDIBELL, L’Hospitalet de Llobregat, Barcelona, Spain

6Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Instituto Salud Carlos III, Madrid, Spain

7Precision Oncology in Girona, IDIBGI, Girona, Spain

8St Vincent’s Clinical School, Faculty of Medicine, University of New South Wales, New South Wales, Australia

9Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia

10Centre for Molecular Oncology, Faculty of Medicine, University of New South Wales, New South Wales, Australia

11Department of Clinical Genetics, Austin Health, Melbourne, Victoria, Australia

12Familial Cancer Service, Royal North Shore Hospital, St Leonards, New South Wales, Australia

13Monash Health Familial Cancer Service, Melbourne, Victoria, Australia

14Familial Cancer Service, Crown Princess Mary Cancer Centre, Westmead Hospital, Westmead, New South Wales, Australia

15Genetic Services of Western Australia, King Edward Memorial Hospital, Perth, Western Australia, Australia

16Adult Genetics Unit, Royal Adelaide Hospital, Adelaide, South Australia, Australia

17 Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia

18Genetic Health Queensland, Royal Brisbane and Women’s Hospital, Brisbane, Queensland, Australia

This rigorous maximum likelihood method has confirmed the high risk for a wide spectrum of cancer types associated with TP53 pathogenic variant status, supporting the use of broad surveillance strategies including dedicated brain and whole-body magnetic resonance imaging.34-37 The findings emphasize the critical role of dedicated breast screening for women from a young age. They also raise the question of whether more consideration should be given to offering other targeted risk management such as colonoscopy, prostate cancer screening, and risk-reducing bilateral salpingo-oophorectomy as standard care for TP53 patho- genic variant carriers.16 It should be noted that the UKCGG Consensus Group indicated there was a strong disagreement about colonoscopy, and did not provide any recommenda- tions about prostate or ovarian cancer, in relation to clinical management of TP53 carriers.37 Applying this approach to even larger data sets modeling multiple cancer types si- multaneously would be valuable to better assess the lifetime risk of cancer types outside the LFS spectrum. Further personalization of clinical management may also be possible if larger data sets were available to allow investigation of variation in cancer risk by more age groupings, variant location/effect, and for so-called reduced-penetrance TP53 variants.

19Hereditary Cancer Clinic, Prince of Wales Hospital, Randwick, New South Wales, Australia

20Prince of Wales Clinical School, UNSW Medicine and Health, UNSW Sydney, Sydney, New South Wales, Australia

21 Tasmanian Clinical Genetics Service, Tasmanian Health Service, Royal Hobart Hospital, Hobart, Tasmania, Australia

22School of Medicine and Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia

23Prince of Wales Hereditary Cancer Centre, Prince of Wales Hospital, Randwick, New South Wales, Australia

24 Parkville Familial Cancer Centre, Peter MacCallum Cancer Centre and Royal Melbourne Hospital, Melbourne, Victoria, Australia

25kConFab, Research Department, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia

26Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia

CORRESPONDING AUTHOR

Paul A. James, MD, PhD; e-mail: paul.james@petermac.org.

EQUAL CONTRIBUTION

C.F., B .- J.F., P.A.J., and A.B.S. contributed equally to this work.

PRIOR PRESENTATION

Presented in part at the American Society of Human Genetics meeting, Los Angeles, CA, October 25-29, 2022.

SUPPORT

Supported in part by NHMRC which provided support in the form of salaries for authors A.B.S. (APP177524) and C.F. (APP1161589). The work of C.F. was additionally supported by a grant from the National Breast Cancer Foundation, Australia (IIRS-21-102). The team from

Downloaded from ascopubs.org by National Library of Medicine - US on April 4, 2026 from 130.014.025.182

Copyright @ 2026 American Society of Clinical Oncology. All rights reserved.

Downloaded from ascopubs.org by National Library of Medicine - US on April 4, 2026 from 130.014.025.182 Copyright @ 2026 American Society of Clinical Oncology. All rights reserved.

Catalan Institute of Oncology was supported by Carlos III National Institute of Health (Spain) funded by 19 FEDER funds-a way to build Europe-[PI19/00553; PI23/00017 and CIBERONC], Government of Catalonia: Pla estratégico de recerca i innovació en salut (PERIS); Grup Consolidat Recerca (2021SGR01112) and CERCA Program. The Inherited Cancer Connect (ICCon) Partnership was funded by the Cancer Council New South Wales Strategic Research Partnership (STREP) scheme (SRP13-02). The team from the Huntsman Cancer, University of Utah utilized the Genetic Counseling Shared Resources which are supported by National Cancer Institute award number P30CA042014.

AUTHOR CONTRIBUTIONS

Conception and design: Cristina Fortuno, Bing-Jian Feng, David Goldgar, Paul A. James, Amanda B. Spurdle

Financial support: Amanda B. Spurdle

Administrative support: Elisa Cops, Amanda B. Spurdle

Provision of study materials or patients: Wendy Kohlmann, Conxi Lázaro, Lidia Feliubadaló, Silvia Iglesias, Mireia Menéndez, David M. Thomas, Ainsley Campbell, Judy Kirk, Nicola Poplawski, Rachel Susman, Kathy Tucker, Rachel Williams, Elisa Cops, Paul A. James Collection and assembly of data: Bing-Jian Feng, Giovanni Innella, Wendy Kohlmann, Conxi Lázaro, Joan Brunet, Lidia Feliubadaló, Silvia Iglesias, Mireia Menéndez, Alex Teulé, Mandy L. Ballinger, David M. Thomas, Ainsley Campbell, Mike Field, Judy Kirk, Nicholas Pachter, Rachel Susman, Kathy Tucker, Mathew Wallis, Rachel Williams, Elisa Cops, Paul A. James, Amanda B. Spurdle

Data analysis and interpretation: Cristina Fortuno, Bing-Jian Feng, Courtney Carroll, Giovanni Innella, Conxi Lázaro, Alex Teulé, Marion Harris, Judy Kirk, Nicola Poplawski, David Goldgar, Paul A. James, Amanda B. Spurdle

Manuscript writing: All authors

Final approval of manuscript: All authors

Accountable for all aspects of the work: All authors

AUTHORS’ DISCLOSURES OF POTENTIAL CONFLICTS OF INTEREST

The following represents disclosure information provided by authors of this manuscript. All relationships are considered compensated unless otherwise noted. Relationships are self-held unless noted.

I = Immediate Family Member, Inst = My Institution. Relationships may not relate to the subject matter of this manuscript. For more information about ASCO’s conflict of interest policy, please refer to www.asco.org/ rwc or ascopubs.org/po/author-center.

Open Payments is a public database containing information reported by companies about payments made to US-licensed physicians (Open Payments).

Bing-Jian Feng Honoraria: OncLive (Intellisphere LLC)

Research Funding: Pfizer (Inst), Pfizer (Inst), Regeneron (Inst), Pfizer (Inst) Patents, Royalties, Other Intellectual Property: The PERCH software, for which I am the inventor, has been nonexclusively licensed to Ambry Genetics for their clinical genetic testing service and research

Courtney Carroll Research Funding: Pfizer (Inst)

Wendy Kohlmann

This author is a member of the JCO Precision Oncology Editorial Board. Journal policy recused the author from having any role in the peer review of this manuscript.

Employment: BioFire Diagnostics

Conxi Lázaro Honoraria: AstraZeneca Spain, SOPHIA Genetics

Joan Brunet Consulting or Advisory Role: MSD Oncology, AstraZeneca Spain Travel, Accommodations, Expenses: GlaxoSmithKline

Alex Teulé

Honoraria: Ipsen, Novartis, AAA HealthCare, Esteve Consulting or Advisory Role: AAA HealthCare, Esteve Travel, Accommodations, Expenses: AAA/Endocyte/Novartis

Mandy L. Ballinger Honoraria: Roche

Research Funding: Pfizer, Amgen, AstraZeneca, Elevation Oncology, Roche, Bayer, Microba, Seagen, Sun Pharma, Lilly, George Clincal Travel, Accommodations, Expenses: Amgen

David M. Thomas Employment: Australian Unity, Omico Honoraria: Roche

Research Funding: Pfizer, Amgen, AstraZeneca, Elevation Oncology, Roche, Bayer, Microba (Inst), Seagen (Inst), Sun Pharma (Inst), Lilly (Inst), George Clincal (Inst), InterVenn Biosciences Travel, Accommodations, Expenses: Amgen

Ainsley Campbell Honoraria: AstraZeneca

Mike Field

Honoraria: AstraZeneca, AstraZeneca Speakers’ Bureau: AstraZeneca, AstraZeneca

Kathy Tucker Uncompensated Relationships: AstraZeneca

Rachel Williams Honoraria: AstraZeneca

No other potential conflicts of interest were reported.

ACKNOWLEDGMENT

The ICCon Partnership: the authors thank all Familial Cancer Clinics (FCCs) that contributed data to this study either through submission of data to the ICCon Database, or directly through the ICCon Partnership infrastructure. Specifically, the authors thank the ICCon State Coordinators, and contributing staff members, for collating these data at each FCC. The authors acknowledge Gillian Mitchell for her role in establishing and leading ICCon during the Partnership’s formative years. kConFab: the authors thank Heather Thorne, Eveline Niedermayr, Sharon Guo, all the kConFab research nurses and staff, the heads and staff of the Family Cancer Clinics, and the Clinical Follow Up Study (which has received funding from the NHMRC, the National Breast Cancer Foundation, Cancer Australia, and the National Institute of Health [United States]) for their contributions to this resource, and the many families who contribute to kConFab. kConFab is supported by a grant from the National Breast Cancer Foundation, and previously by the National Health and Medical Research Council (NHMRC), the Queensland Cancer Fund, the Cancer Councils of New South Wales, Victoria, Tasmania, and South Australia, and the Cancer Foundation of Western Australia. The Huntsman Cancer Institute, University of Utah, team wish to thank Luke Maese, Joshua Shiffman, Jennie Vager, and the entire Family Cancer Assessment Clinic team for providing patient care and contributing data to this study. The authors thank Anne Naumer and Journey Bly for database coordination, and Jo Anson for overseeing the Li-Fraumeni syndrome research program. See Appendix Table A1 for the list of kConFab investigators.

REFERENCES

1. Li FP, Fraumeni JF Jr: Soft-tissue sarcomas, breast cancer, and other neoplasms. A familial syndrome? Ann Intern Med 71:747-752, 1969

2. Li FP, Fraumeni JF Jr: Rhabdomyosarcoma in children: Epidemiologic study and identification of a familial cancer syndrome. J Natl Cancer Inst 43:1365-1373, 1969

3. Daly MB, Pilarski R, Berry M, et al: NCCN Guidelines Insights: Genetic/Familial High-Risk Assessment: Breast and Ovarian, version 2.2017. J Natl Compr Canc Netw 15:9-20, 2017

4. Bougeard G, Renaux-Petel M, Flaman JM, et al: Revisiting Li-Fraumeni syndrome from TP53 mutation carriers. J Clin Oncol 33:2345-2352, 2015

5. Rana HQ, Gelman R, LaDuca H, et al: Differences in TP53 mutation carrier phenotypes emerge from panel-based testing. J Natl Cancer Inst 110:863-870, 2018

6. Kratz CP, Freycon C, Maxwell KN, et al: Analysis of the Li-Fraumeni spectrum based on an international germline TP53 variant data set: An International Agency for Research on Cancer TP53 database analysis. JAMA Oncol 7:1800-1805, 2021

7. de Andrade KC, Khincha PP, Hatton JN, et al: Cancer incidence, patterns, and genotype-phenotype associations in individuals with pathogenic or likely pathogenic germline TP53 variants: An observational cohort study. Lancet Oncol 22:1787-1798, 2021

8. Belman S, Parsons MT, Spurdle AB, et al: Considerations in assessing germline variant pathogenicity using cosegregation analysis. Genet Med 22:2052-2059, 2020

9. Masciari S, Dewanwala A, Stoffel EM, et al: Gastric cancer in individuals with Li-Fraumeni syndrome. Genet Med 13:651-657, 2011

10. Mai PL, Best AF, Peters JA, et al: Risks of first and subsequent cancers among TP53 mutation carriers in the National Cancer Institute Li-Fraumeni syndrome cohort. Cancer 122:3673-3681, 2016 11. Guha T, Malkin D .: Inherited TP53 mutations and the Li-Fraumeni syndrome. Cold Spring Harb Perspect Med 7:a026187, 2017

12. Sandru F, Dumitrascu MC, Petca A, et al: Melanoma in patients with Li-Fraumeni syndrome (Review). Exp Ther Med 23:75, 2022

13. Wong P, Verselis SJ, Garber JE, et al: Prevalence of early onset colorectal cancer in 397 patients with classic Li-Fraumeni syndrome. Gastroenterology 130:73-79, 2006

14. Amadou A, Achatz MIW, Hainaut P .: Revisiting tumor patterns and penetrance in germline TP53 mutation carriers: Temporal phases of Li-Fraumeni syndrome. Curr Opin Oncol 30:23-29, 2018

15. Valdez JM, Nichols KE, Kesserwan C .: Li-Fraumeni syndrome: A paradigm for the understanding of hereditary cancer predisposition. Br J Haematol 176:539-552, 2017 16. Maxwell KN, Cheng HH, Powers J, et al: Inherited TP53 variants and risk of prostate cancer. Eur Urol 81:243-250, 2022

17. Terradas M, Mur P, Belhadj S, et al: TP53, a gene for colorectal cancer predisposition in the absence of Li-Fraumeni-associated phenotypes. Gut 70:1139-1146, 2021

18. Hwang SJ, Lozano G, Amos CI, et al: Germline p53 mutations in a cohort with childhood sarcoma: Sex differences in cancer risk. Am J Hum Genet 72:975-983, 2003

19. Wu CC, Shete S, Amos CI, et al: Joint effects of germ-line p53 mutation and sex on cancer risk in Li-Fraumeni syndrome. Cancer Res 66:8287-8292, 2006

20. Fan X, Wynn J, Shang N, et al: Penetrance of breast cancer susceptibility genes from the eMERGE III network. JNCI Cancer Spectr 5:pkab044, 2021

21. Evans DG, Harkness EF, Woodward ER .: TP53 c.455C>T p.(Pro152Leu) pathogenic variant is a lower risk allele with attenuated risks of breast cancer and sarcoma. J Med Genet 60:1057-1060, 2023

22. Yang X, Leslie G, Doroszuk A, et al: Cancer risks associated with germline PALB2 pathogenic variants: An international study of 524 families. J Clin Oncol 38:674-685, 2020

23. Yang X, Song H, Leslie G, et al: Ovarian and breast cancer risks associated with pathogenic variants in RAD51C and RAD51D. J Natl Cancer Inst 112:1242-1250, 2020

24. Buchanan DD, Stewart JR, Clendenning M, et al: Risk of colorectal cancer for carriers of a germ-line mutation in POLE or POLD1. Genet Med 20:890-895, 2018

25. Li H, Engel C, de la Hoya M, et al: Risks of breast and ovarian cancer for women harboring pathogenic missense variants in BRCA1 and BRCA2 compared with those harboring protein truncating variants. Genet Med 24:119-129, 2022

26. Li S, MacInnis RJ, Lee A, et al: Segregation analysis of 17,425 population-based breast cancer families: Evidence for genetic susceptibility and risk prediction. Am J Hum Genet 109:1777-1788, 2022

27. Fortuno C, Cipponi A, Ballinger ML, et al: A quantitative model to predict pathogenicity of missense variants in the TP53 gene. Hum Mutat 40:788-800, 2019

28. Fortuno C, Pesaran T, Dolinsky J, et al: An updated quantitative model to classify missense variants in the TP53 gene: A novel multifactorial strategy. Hum Mutat 42:1351-1361, 2021

29. Gonzalez KD, Noltner KA, Buzin CH, et al: Beyond Li Fraumeni syndrome: Clinical characteristics of families with p53 germline mutations. J Clin Oncol 27:1250-1256, 2009 30. Reference deleted

31. Bray F, Ferlay J, Laversanne M, et al: Cancer Incidence in Five Continents: Inclusion criteria, highlights from Volume X and the global status of cancer registration. Int J Cancer 137:2060-71, 2015

32. Lange K, Weeks D, Boehnke M .: Programs for pedigree analysis: MENDEL, FISHER, and dGENE. Genet Epidemiol 5:471-472, 1988

33. Fortuno C, Lee K, Olivier M, et al: Specifications of the ACMG/AMP variant interpretation guidelines for germline TP53 variants. Hum Mutat 42:223-236, 2021

34. Ballinger ML, Best A, Mai PL, et al: Baseline surveillance in Li-Fraumeni syndrome using whole-body magnetic resonance imaging: A meta-analysis. JAMA Oncol 3:1634-1639, 2017

35. Bojadzieva J, Amini B, Day SF, et al: Whole body magnetic resonance imaging (WB-MRI) and brain MRI baseline surveillance in TP53 germline mutation carriers: Experience from the Li-Fraumeni Syndrome Education and Early Detection (LEAD) clinic. Fam Cancer 17:287-294, 2018

36. Villani A, Shore A, Wasserman JD, et al: Biochemical and imaging surveillance in germline TP53 mutation carriers with Li-Fraumeni syndrome: 11 year follow-up of a prospective observational study. Lancet Oncol 17:1295-1305, 2016

37. Hanson H, Brady AF, Crawford G, et al: UKCGG Consensus Group guidelines for the management of patients with constitutional TP53 pathogenic variants. J Med Genet 58:135-139, 2020

38. Kratz CP, Achatz MI, Brugieres L, et al: Cancer screening recommendations for individuals with Li-Fraumeni syndrome. Clin Cancer Res 23:e38-e45, 2017

Downloaded from ascopubs.org by National Library of Medicine - US on April 4, 2026 from 130.014.025.182

Copyright @ 2026 American Society of Clinical Oncology. All rights reserved.

Penetrance of TP53 Cancers Using Maximum Likelihood Analysis

APPENDIX

TABLE A1. kConFab MEMBERS (as of November 12, 2023)
NameAddressPhoneEmailQualifications
David AmorMedical Geneticist, Genetic Health Services, Victoria Royal Children's Hospital, Melbourne, VIC 3050Ph: 03 8341 1391david.amor@mcri.edu.auMBBS, PhD
Lesley AndrewsHereditary Cancer Clinic, Prince of Wales Hospital Randwick, NSW 2031Ph: 02 9382 2590lesley@radonc.sesahs.nsw. gov.auMBBS
Yoland AntillDept. Haem and Medical Oncology, Peter MacCallum Cancer Centre, St Andrews Place, East Melbourne, VIC 3002Ph: 03 9656 1111yoland.antill@petermac.orgMBBS, PhD
Rosemary BalleineDepartment of Translational Oncology, C/- Department of Medical Oncology, Westmead Hospital, Westmead, NSW 2145Ph: 02 9845 7754rosemary_balleine@mail.wmi. usyd.edu.auMBBS, PhD FRCPA
Jonathan BeesleyResearch Officer, Queensland Institute of Medical Research, Herston Road Herston, Qld 4002, AustraliaJonathan.Beesley@qimr.edu.auPhD
Ian BennettSilverton Place, 101 Wickham Terrace, Brisbane, QLD 4000Ph: 07 3839 0006icben@bigpond.com.auMBBS, FRACS, FACS
Michael BogwitzFamilial Cancer Centre, The Royal Melbourne Hospital, Grattan Street Parkville, Victoria 3050, AustraliaPh: 61 3 9342 7151Michael.Bogwitz@mh.org.auPhD
Simon BodekConsultant Clinical Geneticist Austin Health, MelbourneSimon.BODEK@austin.org.auMBBS
Leon BotesClinical Nurse Specialist, Hereditary Cancer Centre, Prince of Wales Hospital, Barker St, Randwick, NSW 2031, AustraliaPh: 02 9382 5213Leon.Botes@health.nsw.gov.auPhD
Meagan BrennanNSW Breast Cancer Institute, PO Box 143, Westmead, NSW 2145Ph: 02 9845 6728meaganb@bci.org.auFRACGP, FASBP, PhD
Melissa BrownDepartment of Biochemistry, University of Queensland, St Lucia, QLD 4072Ph: 07 3365 4628melissa.brown@mailbox.uq. edu.auPhD
Michael BuckleyMolecular and Cytogenetics Unit, Prince of Wales Hospital, Randwick, NSW 2031Ph: 02 9382 9164buckleymf@sesahs.nsw.gov.auMBBS, PhD FRCPA
Jo BurkeICON Cancer Care, 2 Melville St, Hobart, TAS 7000Ph: 0408 127 363Jo.Burke@icon.teamPhD
Phyllis ButowMedical Psychology Unit, Royal Prince Alfred Hospital, Camperdown, NSW 2204Ph: 02 9351 2859phyllisb@med.usyd.edu.auPhD
Liz CaldonReplication and Genome Stability Cancer Division, Garvan Institute of Medical Research, 370 Victoria Street, Darlinghurst, NSW 2010, AustraliaPh: 02 9355 5878l.caldon@garvan.org.auPhD
Ian CampbellPeter MacCallum Cancer Centre, St Andrew's Place, East Melbourne, VIC 3002Ph: 03 9656 1803ian.campbell@petermac.orgPhD
(continued on following page)
TABLE A1. kConFab MEMBERS (as of November 12, 2023) (continued)
NameAddressPhoneEmailQualifications
Michelle CaoTasmanian Clinical Genetics Service, Tasmanian Health Service, Royal Hobart Hospital, GPO Box Hobart 7001Ph: 03 6166 8296 1061michelle.cao@ths.tas.gov.au
Anannya ChakrabartiSpecialist Breast Cancer Surgery, Richmond 3121dranannya@gmail.com
Deepa ChauhanSchool of Psychology, Brennan McCallum (Building A18), University of Sydney, 2006Ph: 02 9036 6129deepac@psych.usyd.edu.auPhD
Manisha ChauhanSt Vincents Hospital Cancer Genetics Clinic, The Kinghorn Cancer Centre, Sydney, NSWmanishachauhan@ hotmail.comGDip Gen Couns
Georgia Chenevix-TrenchQueensland Institute of Medical Research, Royal Brisbane Hospital, Herston, QLD 4029Ph: 07 3362 0390; Fx: 07 3362 0105georgiaT@qimr.edu.auPhD
Alice ChristianGenetics Department, Central Region Genetics Service, Wellington Hospital, New ZealandAlice.christian@ccdhb.org.nzBSc (Hons) FHGSA
Paul CohenDirector of Gynaecological Cancer Research, St John of God Subiaco Hospital, 12 Salvado Road, Subiaco, WA 6008, AustraliaPaul.Cohen@sjog.org.auMD, FRANZCOG, Dip Obs, BMBCh
Alison ColleyDepartment of Clinical Genetics, Liverpool Health Service, PO Box 103, Liverpool, NSW 2170Ph: 02 9828 4589A.Colley@unsw.edu.auPhD
Ashley CrookDepartment of Clinical Genetics, Level 3E, Royal North Shore Hospital, St Leonards, NSW 2065Ph: 02 9463 1554akcrook@nsccahs.health.nsw. gov.auGDip Gen Couns
James CuiEpidemiology and Preventive Medicine, Monash University, Prahan, Vic 3004, AustraliaPh: 03 9903 0570james.cui@med.monash. edu.auPhD
Eliza CourtneyDepartment of Clinical Genetics, Level 3E, Royal North Shore Hospital, St Leonards, NSW 2065ECourtney@ccia.org.au
Margaret CummingsDepartment of Pathology, University of Queensland Medical School, Herston, NSW 4006Ph: 07 3365 1530M.Cummings@mailbox.uq. edu.auMBBS, PhD FRCPA
Sarah-Jane DawsonMolecular Genetics Unit, Peter MacCallum Cancer Centre, MelbournePh: 03 855 97132sarahjane.dawson@gmail.comMBBS, PhD
Anna deFazioDept. of Gynaecological Oncology, Westmead Institute for Cancer Research, Westmead Hospital, Westmead, NSW 2145Ph: 0 2 9845 7376anna_defazio@wmi.usyd. edu.auPhD
Martin DelatyckiDirector, Clinical Genetics, Austin Health, Heidelberg Repatriation Hospital, PO Box 5444, Heidelberg West, Vic 3081, AustraliaPh: 3 9496 4355martin.delatycki@austin.org.auMBBS, PhD
Rebecca DicksonAssociate Genetic Counsellor, Level 2, Block 51, Royal North Shore Hospital, North Shore, NSW 2408Ph: 02 9926 6872RDickson@nsccahs.health.nsw. gov.auGDip Gen Couns
Joanne DixonCentral Regional Genetic Services, Wellington Hospital, Private Bag 7902, Wellington, New ZealandPh: 04 385 5310woutjwd@mash.wnhealth.co.nzMB ChB, FRACP
(continued on following page)

Penetrance of TP53 Cancers Using Maximum Likelihood Analysis

TABLE A1. kConFab MEMBERS (as of November 12, 2023) (continued)
NameAddressPhoneEmailQualifications
Ted EdkinsClinical Chemistry, Princess Margret Hospital for Children, Box D184, Perth, WA 6001Ph: 08 9340 8595tedkins@cygnus.uwa.edu.auPhD
Stacey EdwardsDepartment of Biochemistry and Molecular Biology, University of Queensland, St Lucia, Qld 4072, AustraliaPh: 07 3365 4634stacey.edwards@uq.edu.auPhD
Gelareh FarshidTissue Pathology, IMVS, Adelaide, SA 5000Ph: 08 8222 3259gelareh.farshid@imvs.sa.gov.auMBBS, PhD FRCPA
Andrew FellowsMolecular Diagnostic Development, Pathology Department, Peter MacCallum Cancer Centre, Melbourne, East Melbourne, Vic 3002Ph: 03 9656-3595andrew.fellowes@petermac.orgPhD
Georgina FentonSouth West Family Cancer Clinic, Liverpool Hospital, Liverpool, BC, NSW 1871Ph: 02 9828 4665georginafenton@hotmail.comGDip Gen Couns
Michael FieldClinical Geneticist, Royal North Shore Hospital, Level 2, Vindin House, St Leonards, NSW 2065Ph: 02 9926 7497mjfield@nsccahs.health.nsw. gov.auMBBS, PhD
James FlanaganEpigenetics Unit, Department of Surgery and Oncology, Imperial College London, London, W12 0NN, EnglandPh: +44 (0) 20 759, 41804j.flanagan@imperial.ac.ukPhD
Peter FongMedical Oncology Department, Regional Cancer and Blood Services, Level 1, Building 7, Auckland City Hospital, 2 Park Rd., Grafton, Auckland 1023, New ZealandPh: +6493074949; Extn. 23867pfong@adhb.govt.nzMBBS, FRACP
Laura ForrestPsychosocial Cancer Genetics Research Group, Parkville Familial Cancer Centre, 305 Grattan Street, Melbourne, Vic 3000, AustraliaPh: 3 85596191Laura.Forrest@petermac.orgPhD
Stephen FoxPathology Department, Level 1, Peter MacCallum Cancer Centre, St Andrew's Place, East Melbourne, Vic 3002Ph: 03 9656 1529Stephen.Fox@petermac.orgBSc, MBChB, FRCPath, FFSc, FRCPA, DPhil
Juliet FrenchSchool of Molecular and Microbial Sciences, University of Queensland, St Lucia, Qld 4072Ph: 07 3365 4634j.french@uq.edu.auPhD
Michael FriedlanderProfessor of Medicine, Department of Medical Oncology, Prince of Wales Hospital, Randwick, NSW 2031Ph: 02 9382 2606m.friedlander@unsw.edu.auMBChB, MRCP, FRACP PhD
Clara GaffVictorian Clinical Genetics Service, Royal Melbourne Hospital, Parkville, VIC 3052Ph: 03 9342 7151clara.gaff@mh.org.auPhD
Mike GattasQueensland Clinical Genetic Service, Royal Children's Hospital, Bramston Terrace, Herston, QLD 4020Ph: 07 3636 1686Michael_Gattas@health.qld. gov.auMBBS, FRACP
Peter GeorgeClinical Biochemistry Unit, Canterbury Health Labs, PO Box 151, Christchurch, New ZealandPh: 64 3 364 0336pgeorge@clear.net.nzPhD
Sian GreeningIllawarra Cancer Centre, Wollongong Hospital, Private Mail Bag 8808, South Coast Mail Centre, NSW 2521Ph: 02 4222 5576Sian.Greening@SESIAHS. HEALTH.NSW.GOV.AUGDip Gen Couns
(continued on following page)
TABLE A1. kConFab MEMBERS (as of November 12, 2023) (continued)
NameAddressPhoneEmailQualifications
Marion HarrisFamilial Cancer Clinic, Peter MacCallum Cancer Centre, St Andrews Place, East Melbourne, VIC 3002Ph: 03 9656 1199marion.harris@optusnet. com.auMBBS, FRACP
Stewart HartBreast and Ovarian Cancer Genetics, Monash Medical Centre, 871 Centre Road, Bentleigh East, VIC 3165Ph: 03 9579 6122centreroad@ozmail.com.auMBBS, FRACS
Nick HaywardQueensland Institute for Medical Research, Royal Brisbane Hospital, Post Office, Herston, QLD 4029Ph: 07 3362 0306nickH@qimr.edu.auPhD
John HopperCentre for M.E.G.A. Epidemiology, University of Melbourne, Level 1, 723 Swanston Street, Carlton, VIC 3010Ph: 03 8344 0697j.hopper@gpph.unimelb.edu.auPhD
Cass HoskinsParkville Familial Cancer Centre, Peter MacCallum Cancer Centre and The Royal Melbourne Hospital, Melbourne, 3000Ph: 03 8559 5322Cass.Hoskins@petermac.orgBSci
Clare HuntSouthern Health Familial Cancer Centre, Monash Medical Centre, Special Medicine Building, 246, Clayton Rd, Clayton, Victoria 3168, AustraliaPh: 03 9594 2009Clare.Hunt@southernhealth. org.auGDip Gen Couns
Paul JamesClinical Geneticist, Genetic Health Services, Monash Medical Centre, Clayton, VicPh: 03 9594 2026paul.james@ghsv.org.auMBBS, PhD
Mark JenkinsCentre for M.E.G.A. Epidemiology, The University of Melbourne, 723 Swanston Street, Carlton, VIC 3053Ph: 03 8344 0902m.jenkins@unimelb.edu.auPhD
Alexa KiddClinical Genetics Departments, Central Regional Genetics Service, Wellington Hospital, New ZealandAlexa.Kidd@ccdhb.org.nzMBBS, MRCP, MRCGP
Judy KirkFamilial Cancer Service, Department of Medicine, Westmead Hospital, Westmead, NSW 2145Ph: 02 9845 6947judy.kirk@sydney.edu.auMBBS, PhD
Jessica KoehlerHereditary Cancer Clinic, Prince of Wales Hospital, Randwick, NSW 2031Ph: 02 9382 3415Jessica.koehler@SESIAHS. health.nsw.gov.auGDip Gen Couns
James KolliasBreast Endocrine and Surgical Unit Royal Adelaide Hospital, North Terrace, SA 5000Ph: 08 8215 0123jkollias@rah.sa.gov.auMBBS, FRACS
Sunil LakhaniUQ Centre for Clinical Research, Level 6, Building 71/918, University of Queensland, The Royal Brisbane and Women's Hospital, Herston 4029Ph: 07 3346 6052s.lakhani@uq.edu.au
Mitchell LawrenceProstate Cancer Research Program, 19 Innovation Walk, Level 3, Monash University, Clayton 3800Ph: 03 9902 9286mitchell.lawrence@ monash.eduPhD
Jason LeeEpigenetics and Disease Laboratory, QIMR Berghofer Medical Research Institute, Brisbane 4006Ph: 07 3845 3951Jason.Lee@qimrberghofer. edu.au
(continued on following page)

Penetrance of TP53 Cancers Using Maximum Likelihood Analysis

TABLE A1. kConFab MEMBERS (as of November 12, 2023) (continued)
NameAddressPhoneEmailQualifications
Shuai LiCentre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Level 3, 207 Bouverie Street, Carlton, VIC 3053Ph: 03 9035 8224shuai.li@unimelb.edu.au
Geoff LindemanBreast Cancer Laboratory, Walter and Eliza Hall Institute, PO Royal Melbourne Hospital, Parkville, VIC 3050Ph: 03 9342 2611Lindeman@wehi.edu.auBSc, MBBS, PhD, FRACP FAHMS FAA
Jocelyn LippeyDepartment of Surgery St Vincent's Hospital, Melbournejlippey@gmail.comMBBS, PhD
Lara LiptonMedical Oncology and Clinical Haematology Unit, Western Hospital, Footscray, VICLara.Lipton@mh.org.auBSc, MBBS, PhD
Liz LobbMedical Psychology Research Unit, Room 332, Brennan MacCallum Building (A18), The University of Sydney, Camperdown 2006Ph: 02 9351 4597lizl@psych.usyd.edu.auPhD
Sherene LoiHead of the Translational Breast Cancer, Genomics and Therapeutics Laboratory, Medical Oncologists, The Peter MacCallum Cancer Centre, Melbourne 3000Sherene.Loi@petermac.org
Graham MannWestmead Institute for Cancer Research, Westmead Millennium Institute, Westmead, NSW 2145Ph: 02 9845 9056gmann@mail.usyd.edu.auMBBS, PhD, FRACP
Deborah MarshKolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, NSW 2065Ph: 02 9926 6873Debbie_Marsh@med.usyd. edu.auPhD
Sue Anne McLachlanDepartment of Oncology, St Vincent's Hospital, 41 Victoria Parade, Fitzroy, VIC 3065Ph: 03 9288 3155mclachsa@mail.svhm.org.auMBBS, PhD
Bettina MeiserHereditary Cancer Clinic, Prince of Wales Hospital, Randwick, NSW 2031Ph: 02 9382 2638b.meiser@unsw.edu.auPhD
Roger MilneCentro Nacional de Investigaciones Oncologicas, C/Melchor Fernández Almagro, 3, E-28029 Madrid, Spainrlm@unimelb.edu.auPhD
Sophie NightingaleWestern Health and Peter MacCallum Cancer Centre, Consultant, General, Breast and Melanoma Surgeon, St Andrews Place, East Melbourne, Victoria 3002Ph: 03 9318 6027mail@sophienightingale. com.auMB ChB, MS, FRACS
Shona O'ConnellSouthern Health Familial Cancer Centre, Special Medicine Building, 246 Clayton Road, Clayton, Vic 3168Ph: 03 9594 2009Shona.OConnell@ southernhealth.org.auGDip Gen Couns
Sarah O'SullivanGenetic Services of Western, Level 3, Agnes Walsh House, 374 Bagot Road, Subiaco, WA 6008, AustraliaPh: 8 6458 1603Sarah.O'Sullivan@health.wa. gov.auGDip Gen Couns
(continued on following page)
TABLE A1. kConFab MEMBERS (as of November 12, 2023) (continued)
NameAddressPhoneEmailQualifications
David Gallego OrtegaTumour Development Group, Garvan Institute of Medical Research, The Kinghorn Cancer Centre, 370 Victoria St, Darlinghurst, NSW 2010, AustraliaPh: 61 (0)2 9355 5776d.gallego@garvan.org.auPhD
Nick PachterFamilial Cancer and Clinical Genetics, Royal Melbourne Hospital, Grattan Street, Parkville, VIC 3050, AustraliaPh: 03 9342 4244nick.pachter@mh.org.auMB ChB
Jia-Min PangMolecular Pathology Department Peter, MacCallum Cancer Centre, Melbourne, 3000Ph: 03 8559 6501Jia-Min.Pang@petermac.org
Gargi PathakClinical Geneticist, Genetic Services of Western Australia, Women and Newborn Health Service, Agnes Walsh House, King Edward Memorial Hospital, 374 Bagot Road, Subiaco, WA 6008Ph: 08 6458 1603gargi.pathak@health.wa.gov.au
Briony PattersonTas Clinical Genetics Service, Royal Hobart Hospital, GPO Box 1061, Hobart, Tasmania 7001, AustraliaPh: 03 6222 8296briony.patterson@dhhs.tas. gov.auGDip Gen Couns
Amy PearnThe Gene Council, Perth, Australia, PO Box 510, North Perth, WA 6906, AustraliaPh: (08) 6118 3586amypearn@thegenecouncil. com.auGDip Gen Couns
Kelly PhillipsDepartment of Medical Oncology, Peter MacCallum Cancer Centre, St Andrews Place, East Melbourne, VIC 3002Ph: 03 9656 1810kelly.phillips@petermac.orgMBBS, MD, FRACP
Ellen PieperAssociate Genetic Counsellor, Parkville Familial Cancer Centre and Genomic Medicine, VCCC, Grattan Street, Melbourne, Vic 3000, AustraliaPh: 61 3 9342 7151Ellen.Pieper@mh.org.auGDip Gen Couns
Susan RamusSchool of Women's and Children's Health, Adult Cancer Program, Level 2, Lowy Cancer Research, Centre, Cnr High and Botany St, UNSWPh: 02 9385 1720s.ramus@unsw.edu.au
Edwina RickardFamilial Cancer Centre, Westmead Hospital, Westmead, NSW 2145Ph: 02 9845 6947edwina_rickard@wmi.usyd. edu.auGDip Gen Couns
Bridget RobinsonOncology Service, Christchurch Hospital, Private Bag 4710, Christchurch, New ZealandPh: 03 364 0020brobinson@chmeds.ac.nzBMedSc MD FRACP
Mona SalehCentre for Genetic Education, Prince of Wales Hospital, Randwick, NSW 2031Ph: 02 9926 7324msaleh@nsccahs.health.nsw. gov.auPhD
Anita SkandarajahDeputy Director, General Surgery, The Royal Melbourne Hospital, Consultant, Breast and Endocrine Surgeon, The Royal Melbourne Hospital and Peter Mac Callum Centre, The University of MelbournePh: 03 93475785anita.skandarajah@mh.org.au
Elizabeth SalisburyAnatomical Pathology, Conjoint Associate Professor, UNSW, Prince of Wales Hospital, Randwick, 2031 NSWPh: 02 9382 9025E.Salisbury@westernsydney. edu.auMBBS, FRCPA
(continued on following page)

Penetrance of TP53 Cancers Using Maximum Likelihood Analysis

TABLE A1. kConFab MEMBERS (as of November 12, 2023) (continued)
NameAddressPhoneEmailQualifications
Christobel SaundersDirector, Breast Surgery, The Royal Melbourne Hospital, The Royal Melbourne Hospital and Peter Mac Callum Centre, The University of MelbournePh: 93475785christobel.saunders@uwa. edu.auMB BS, FRCS, FRACS, FAAHMS
Jodi SaunusBreast Pathology, University of Queensland Centre for Clinical Research, Building 71/918, The Royal Brisbane and Women's Hospital, Herston, Qld 4029Ph: 07 3346 6048j.saunus@uq.edu.auPhD
Peter SavasPeter MacCallum Cancer Centre, Department of Medical Oncology, St Andrews Place, East Melbourne, VIC 3002Ph: 03 8559 7134Peter.savas@petermac.orgMBBS, PhD,FRACP
Rodney ScottHunter Area Pathology Service, John Hunter Hospital, Locked Bag 1, Regional Mail Centre, NSW 2310Ph: 02 4921 3000Rodney.Scott@hnehealth.nsw. gov.auPhD
Clare ScottResearch Department, WEHI C/ o, Royal Melbourne Hospital, Parkville, 3050Ph: 03 9345 2555scottc@wehi.edu.auMBBS, PhD,FRACP
Adrienne SextonFamilial Cancer Centre, Royal Melbourne Hospital, Grattan Street, Parkville, Vic 3050Ph: 9342 7151Adrienne.Sexton@mh.org.auGDip Gen Couns
Joanne ShawExecutive Director, Psycho-Oncology Cooperative Research Group (PoCoG), Senior Research Fellow School of Psychology, Faculty of Science, The University Of SydneyPh: 02 9351 3761joanne.shaw@sydney.edu.auPhD
Andrew ShellingObstetrics and Gynaecology, University of Auckland, New Zealanda.shelling@auckland.ac.nzPhD
Shweta SrinivasaStaff Specialist in Cancer Genetics, Westmead Familial Cancer ServicePh: 02 8890 6947Shweta.Srinivasa@health.nsw. gov.auMBBS
Peter SimpsonThe University of Queensland, Building 71/918, RBWH Campus, Herston, Qld 4029Ph: 07 3346 6048p.simpson@uq.edu.auPhD
Melissa SoutheyGenetic Epidemiology Laboratory, Department of Pathology, University of Melbourne, VIC 3010Ph: 03 8344 4895msouthey@unimelb.edu.auPhD
Amanda SpurdleCancer Unit, Queensland Institute of Medical Research, Herston, QLD 4029Ph: 07 3362 0371mandyS@qimr.edu.auPhD
Jessica TaylorFamilial Cancer and Genetics Medicine, Royal Melbourne Hospital, 2nd Floor, Grattan Street, Parkville, Vic 3050, AustraliaPh: 03 9342 7151jessica.taylor@mh.org.auGDip Gen Couns
Renea TaylorDeputy Head, Cancer Program, Monash University, Rm 349, Level 3, Building 76, 19 Innovation Walk, Clayton, VIC 3800Ph: 03 9902 9287renea.taylor@monash.eduPhD
Heather ThorneResearch Department, Peter MacCallum Cancer Centre, St Andrews Place, East Melbourne, VIC 3002Ph: 03 96561542heather.thorne@petermac.orgGrad Dip Clin Res
(continued on following page)
TABLE A1. kConFab MEMBERS (as of November 12, 2023) (continued)
NameAddressPhoneEmailQualifications
Alison TrainerUniversity of NSW, Prince of Wales Hospital, Barker Street, Randwick, NSW 2031Ph: 02 9382 2551Alison.Trainer@sesiahs.health. nsw.gov.auMBBS, PhD
Kathy TuckerHeredity Cancer Clinic, Prince of Wales Hospital, Randwick, NSW 2031Ph: 02 93822551TuckerK@sesahs.nsw.gov.auMBBS, FRACP
Jane VisvaderThe Walter and Eliza Hall Institute of Medical Research, Post Office Royal Melbourne Hospital, Parkville, VIC 3050Ph: 03 9342 2555visvader@wehi.edu.auPhD
Logan WalkerMolecular Cancer Epidemiology Laboratory, Queensland Institute of Medical Research, P.O. Royal Brisbane Hospital, Herston, Qld 4027, AustraliaPh: 07 3362 0395logan.walker@qimr.edu.auPhD
Rachael WilliamsFamily Cancer Clinic, St Vincent's Hospital, Darlinghurst, NSW 2010Ph: 02 8382 3395rwilliams@stvincents.com.auGDip Gen Couns
Ingrid WinshipDepartment of Genetics, Royal Melbourne Hospital, Parkville, 3050Ph: 03 9342 7000Ingrid.Winship@mh.org.auMB ChB, MD, FRACP, FACD, FAICD
Mary Ann YoungGenome.One, 370 Victoria St, Darlinghurst, 2010 NSWPh: 02 9359 8002m.young@garvan.org.auMHSc
Milita ZaheedStaff Specialist, Prince of Wales Hereditary Cancer Centre, Level 1, Bright Building, Barker Street, Randwick, NSW 2031Ph: 02 9382 5107Milita.Zaheed@health.nsw. gov.au